GMBHR168 Datasheet, PDF (52/70 Pages) List of Unclassifed Manufacturers – Mini BLOCK Housing 16 opto inputs, 8 Relay outputs

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ITALIAN TECHNOLOGY
- HW SERIAL LINE A IN RS 485 (option .RS 485)
J3,J4
= (*)
Hardware ZC1
J5
= position 1-2 (**) IC10
J6
= position 1-2
IC11
J7
= position 1-2
IC12
J8
= position 1-2
IC8
= serial in TTL (#)
= driver SN 75176 or MAX 483
= no device
= no device
= no device
In this modality the signals to use are pins 5 and 6 of connector CN6, that become transmission
or reception lines according to the status of signal DIR, managed by software, as follows:
DIR
=low level
= logic state 0 -> transmitter enabled
DIR
=high level = logic state 1 -> transmitter disabled
This kind of serial communication can be used for multi-point connections, in addition it is
possible to listen to own transmission, so the user is allowed to verify the succes of
transmission. In fact, any conflict on the linecan be recognized by testing the received character
after each transmission.
- HW SERIAL LINE A IN TTL
J3,J4
= not connected
J5
= indifferent
J6
= position 2-3
J7
= position 2-3
J8
= position 2-3
Hardware ZC1
IC10
IC11
IC12
IC8
= serial in TTL (#)
= no device
= no device
= no device
= no device
(*) If using the RS 422 or RS 485 serial line, it is possible to connect the terminating and forcing
circuit on the line by using jumpers J3 and J4. This circuit must be always connected in case
of point-to-point connections, while in case of multi-point connections it must be connected
olny in the farest boards, that is on the edges of the commmunication line.
During a reset or a power on, signal DIR is at logic level high, so during these phases driver
RS 485 is in reception or transmission driver RS 422 is disabled, to avoid confilcts on line.
(**) In case of RS 422 or RS 485 communication, signal DIR can be selected according to the
connection of jumper J10:
J10 in position 1-2
J10 in position 2-3
-> DIR = MM PIN 17
-> DIR = MM PIN 30
This allows to use the resources of hardware installed on socket ZC1 the best way possible,
whithout having to use and I/O signal of CN4 for serial communication.
(#) Serial line of hardware installed on socket ZC1 must be designed to connect signals MM PIN
9 and MM PIN 10 respectively to RS 232 RX and TX where "serial line in RS 232" is required
or TTL RX and TX (e. g., generated by a microcontroller on board UART) where "serial line
in TTL" is required
For further information, refer to connection examples of figures 8÷15.
Page 44
GMB HR168 Rel. 5.00